[ntp:questions] how do I lock in average frequency correction

David J Taylor david-taylor at blueyonder.co.uk.invalid
Mon Feb 13 07:13:20 UTC 2012

"unruh" <unruh at invalid.ca> wrote in message 
news:AMVZq.14470$9j5.828 at newsfe09.iad...
> The problem on windows is I believe that there is no way to alter the
> system clock rate.

Directly on Windows, no, but this facility /does/ exist in the Windows 
port of NTP to address clocks which are stable, but near or outside the 
500 ppm error allowed:

  "Set the system environment variable: NTPD_TICKADJ_PPM to the value you 
need.  On Windows XP, this is through the Control Panel.  System..., 
System, Advanced..., Environment variables button, System variables.  Add 
a New system variable, with the name NTPD_TICKADJ_PPM and the value 500 
(or -500 if your ntp.drift was limiting at its negative extreme)."


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